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Application of magnetic ionic liquid as magnetic seal lubricating material

A magnetic ionic liquid and lubricating material technology, applied in the direction of magnetic liquid, lubricating composition, base material, etc., can solve the problems of application conditions and service life limitations, large specific surface area of ​​nanoparticles, thermodynamic instability, etc., to avoid environmental pollution and resource waste, stable physical and chemical properties, and strong magnetic response performance

Inactive Publication Date: 2018-11-06
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large specific surface area of ​​nanoparticles and many charges or functional groups on the surface of the powder, its specific surface energy is high, and it is a thermodynamically unstable system. Long-term use or changes in some external environments are likely to cause magnetic particles. Agglomeration and settlement limit its application conditions and service life

Method used

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  • Application of magnetic ionic liquid as magnetic seal lubricating material
  • Application of magnetic ionic liquid as magnetic seal lubricating material
  • Application of magnetic ionic liquid as magnetic seal lubricating material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A kind of magnetic ionic liquid, its concrete composition is [C 6 mim] 5 [Dy(SCN) 8 ]. Under the action of a magnetic field, the magnetic ionic liquid was immobilized in the frictional contact area and combined with a commercially available magnetic lubricant (DIOS+Fe 3 o 4 , Fe 3 o 4 wt% is 20%), and the tribological properties of magnetic ionic liquids and magnetic lubricants under vertical loads of 100N and 200N at 25°C were investigated respectively. Friction conditions: 316 steel balls with a diameter of 4mm paired with 304 steel sheets for the friction pair; the single stroke is 5mm; the linear speed is 10mm / S; the test temperature is 25°C; For specific friction results, see figure 1 .

[0023] Depend on figure 1 It can be seen that under the condition of room temperature (25°C) of magnetic ionic liquid, the friction curve is stable, the average friction coefficient decreases by 40% and 32% compared with the magnetic lubricant when the load is 100N and 2...

Embodiment 2

[0025] A kind of magnetic ionic liquid, its concrete composition is [C 6 mim] 5 [Dy(SCN) 8 ]. Under the action of a magnetic field, the magnetic ionic liquid was immobilized in the frictional contact area and combined with a commercially available magnetic lubricant (DIOS+Fe 3 o 4 , Fe 3 o 4 The tribological properties of magnetic ionic liquids and magnetic lubricants under vertical loads of 100N and 200N at 150°C were compared. Friction conditions: 316 steel balls with a diameter of 4mm paired with 304 steel sheets for the friction pair; single stroke is 5mm; For specific friction results, see figure 2 .

[0026] Depend on figure 2 It can be seen that under the condition of high temperature (150°C) of magnetic ionic liquid, the friction coefficient is significantly lower than that of magnetic lubricant at loads of 100N and 200N, and changes steadily with time. When the load is 100N and 200N, the wear volume under magnetic ionic liquid lubrication is reduced by 87%...

Embodiment 3

[0028] A kind of magnetic ionic liquid, its concrete composition is [C 2 mim] [FeCl 4 ]. Under the action of a magnetic field, the magnetic ionic liquid was immobilized in the frictional contact area and combined with a commercially available magnetic lubricant (DIOS+Fe 3 o 4 , Fe 3 o 4 wt% is 20%) for comparison. The tribological properties of the magnetic ionic liquid and the magnetic lubricant at 25°C and 150°C were investigated respectively under the condition of a load of 100N. Friction conditions: Silicon nitride steel balls with a diameter of 4mm are used to pair with 304 steel sheets for the friction pair; the single stroke is 5mm; the linear speed is 10mm / S; the type and size of the magnetic field: a magnetic field generated by a magnet, 200mT. For specific friction results, see image 3 .

[0029] Depend on image 3 It can be seen that after changing the frictional pair to silicon nitride and steel sheet, the friction coefficient of magnetic ionic liquid is...

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Abstract

The invention relates to a novel application of a magnetic ionic liquid as a high-temperature magnetic seal lubricating material. The magnetic ionic liquid has low (no) vapor pressure, good heat stability and magnetic controllability. Through application of a controllable external magnetic field, the lubricating surface can be accurately filled with the magnetic ionic liquid, continuous lubrication is realized, and leakage and outside pollution can be prevented in the lubrication process. Compared with conventional magnetic lubricating materials, the magnetic ionic liquid can effectively solvethe problems of magnetic particle aggregation, sedimentation and the like as a pure substance, has the advantages of high stability, no vapor pressure and the like under the condition of high temperature and is a novel, efficient, stable, safe and environment-friendly magnetic seal lubricating material.

Description

technical field [0001] The invention belongs to the technical field of development and utilization of new lubricating materials, and in particular relates to a new application of a magnetic ionic liquid as a lubricating material for magnetic seals. Background technique [0002] With the continuous advancement of industrial technology, people put forward higher requirements for the performance of mechanical lubricants. In addition to excellent load-carrying capacity, good anti-friction and anti-wear and extreme pressure performance, it is also required to have self-healing, controllable and Environmentally friendly and other characteristics. As a novel lubricant, the main feature of magnetic lubricant is that under the action of an external magnetic field, it can not only accurately fill the lubricating surface to achieve continuous lubrication, but also can offset the effects of gravity and centripetal force during the lubrication process to prevent leakage and External pol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M105/70C10M105/80H01F1/44C10N30/06
CPCC10M105/70C10M105/80C10N2030/06H01F1/44
Inventor 张春丽张晟卯张玉娟贾佳佳张平余
Owner HENAN UNIVERSITY
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